[PATCH v2 0/5] MR8481: Improve compiler detection for Clang in MSVC mode

[Jacek Caban (＠jacek)]

Clang doesn't define `__GNUC__` in MSVC compatibility mode, but it still provides the functionality typically associated with it.

--
  v2: oleaut32: Remove __GNUC__ check.
      ntoskrnl: Remove __GNUC__ check.
      ntdll/tests: Remove __GNUC__ checks.
      ntdll: Remove __GNUC__ checks.
      krnl386: Remove __GNUC__ check.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/8481